I wonder if anyone can help me please. I inherited a grape vine 22 years ago. It's roots are in my greenhouse and the stem looks very healthy although I cannot shut my greenhouse door as it has grown outside some 3 ft or more. I get bunches of green grapes every year but they only grow to about half size then they turn black, wither and eventually fall off. I know I am doing something wrong but can anyone tell me what please.
Kindest regards - Jenny
- 26 Sep, 2011